To set up SMS sending to your customers please go to Dashboard > Settings > SMS Settings
In this section you can set up SMS or Text message to be sent to your customer's phone to notify New bookings and Order status changes. This service is provided by Clickatell and you will need to have an account with them to set up all required information in this section. Click here for more information and sign up: Clickatell SMS Gateway connectivity to 819 Networks in 222 countries.
Clickatell API - fill in the API key you get from Clickatell after sign up.
Clickatell User name - fill in your Clickatell user name
Clickatell password - fill in your Clickatell password
Country Phone code - fill in your Country phone code without leading 0 or + sign eg. United Kingdom: 44 (NOT 044 or +44)
Source address (Sender Id) - optional, if you are Small business account holder at Clickatell. This is a short number assigned to you by Clickatell and the Sender ID will be between 1 and 16 characters long